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FAIR VALUE (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Liabilities    
Fair value of long-term obligations $ 803,000 $ 760,000
Assets and liabilities measured at fair value on recurring basis    
Assets    
Forward exchange contracts, assets 612 2,036
Total assets at fair value 612 2,036
Liabilities    
Forward exchange contracts, liabilities 1,285 1,197
Total liabilities at fair value 1,285 1,197
Assets and liabilities measured at fair value on recurring basis | Level 2    
Assets    
Forward exchange contracts, assets 612 2,036
Total assets at fair value 612 2,036
Liabilities    
Forward exchange contracts, liabilities 1,285 1,197
Total liabilities at fair value $ 1,285 $ 1,197